Fabrication of 3D flower-shaped MgAl-LDHs with inducing CuMOF for improving its adsorption and antibacterial performance

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2024-11-02 DOI:10.1016/j.molstruc.2024.140583

Yuanyuan Chen, Fengqin Tang, Feng Zhang, Yufeng He, Pengfei Song, Rongmin Wang

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Abstract

Chronic and inappropriate use of antibiotics, antibiotic residue, and bacterial infections present a significant threat to both the environment and human health. This study focused on the effective remediation of wastewater contaminants through the synthesis of Cu-based metal-organic framework (CuMOF) conjugated with layered double hydroxide (LDHs) via hydrothermal processing, resulting in the development of a novel three-dimensional (3D) flower-shaped CuMOF@LDHs (Fc-LDHs) hybrid materials. After being characterized by SEM, FT-IR, XRD, zeta potential and BET, the obtained Fc-LDHs was applied to adsorption of antibiotics, and its antibacterial activity was also investigated. It indicated that Fc-LDHs exhibited excellent performance in both adsorption and antibacterial activity. Utilizing tetracycline (TC) as a representative antibiotic, the influence of various parameters on the adsorption efficiency was examined. The study revealed that an adsorbent mass of 0.08 g could achieve a removal efficiency of 94.2 % for TC at an initial concentration of 50 mg/L within 90 min, with the removal rate remaining at 72.6 % after four cycles of adsorption-desorption. It was also found that the adsorption mechanism was consistent with the Freundlich isothermal model and the pseudo-second-order kinetic model. The exceptional adsorption properties were primarily ascribed to the synergistic effects of electrostatic interactions, pore filling, chelation and hydrogen bonding interactions between Fc-LDHs and TC. Simultaneously, the antibacterial rates of Fc-LDHs reached to 90.3 % and 95.7 % against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively. In conclusion, Fc-LDHs proved to be a highly efficient remedy for addressing antibiotic and antibacterial pollution, functioning both as a proficient adsorbent and antibacterial agent.

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用诱导型 CuMOF 制备三维花状 MgAl-LDHs 以改善其吸附和抗菌性能

抗生素的长期不当使用、抗生素残留和细菌感染对环境和人类健康都构成了严重威胁。本研究的重点是通过水热处理合成铜基金属有机框架（CuMOF）与层状双氢氧化物（LDHs），从而开发出一种新型三维（3D）花形 CuMOF@LDHs（Fc-LDHs）杂化材料，以有效修复废水污染物。在对得到的 Fc-LDHs 进行了 SEM、FT-IR、XRD、ZETA 电位和 BET 表征后，将其用于吸附抗生素，并研究了其抗菌活性。结果表明，Fc-LDHs 在吸附和抗菌活性方面均表现出优异的性能。以四环素（TC）为代表抗生素，研究了各种参数对吸附效率的影响。研究发现，吸附剂质量为 0.08 克时，在 90 分钟内对初始浓度为 50 毫克/升的 TC 的去除率可达 94.2%，经过四次吸附-解吸循环后，去除率仍为 72.6%。研究还发现，吸附机理符合 Freundlich 等温模型和假二阶动力学模型。Fc-LDHs 与 TC 之间的静电作用、孔隙填充、螯合作用和氢键作用的协同效应是其优异吸附性能的主要原因。同时，Fc-LDHs 对大肠杆菌和金黄色葡萄球菌的抗菌率分别达到 90.3% 和 95.7%。总之，Fc-LDHs 被证明是解决抗生素和抗菌污染问题的一种高效疗法，它既是一种吸附剂，又是一种抗菌剂。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

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